I've being doing some research regarding how to present a good quality technical document (to be more specific, a PhD Thesis).
It seems to me there is some consensus regarding the fonts (as described in What font types are good for a technical document? and Fonts for technical reports), which makes me very happy because I really like when standards are around.
So, since my thesis is in biomedical engineering, I've come to two conclusions: to use Times New Roman and to set the main font at 12pt (most of my readers are over 40 years old).
Now what I need to know as one of the most general characteristics is what the text block should be. I've read some Tschichold's guidelines, and it can be summarized like this:
textwidth=0.66666667\paperwidth,% inner=0.123\paperwidth,% (inner margin) textheight=0.666666667\paperheight,% bottom=0.22222222\paperheight,% headheight=1em,%
(Look here for a graphical description)
Now, it seems that is somewhat The Standard (although yesterday I was in a bookstore and I didn't see any book following Tschichold's scheme) for writing books, but is it OK to assume this should be the layout for a technical document? If not, what other set of rules can I follow?